New 2006 Porsche 997 Turbo Arrives

Behind the Turbo's distinctive look is a more
powerful version of Porsche's twin-
turbocharged 3.6-liter six-cylinder engine.
High-level Zuffenhausen sources say the
powerplant

Our spies haveundermined Porsche's plan to keep its seventh-generation
911 Turbo secret until its world premiere at the Geneva motor show next
February.

Shown here, devoid of bulky camouflage, blackout paint and taped
disguise, is the turbocharged version of the new 997 as it will appear on
American highways by next June. We caught the production-ready
prototype as it ventured out of Porsche's factory gates for final
shakedown tests. The photos reveal a curvaceous appearance and eye-
catching details that are bound to set Zuffenhausen's latest
performance leader apart from tamer versions of the 911.

Building on the wide-bodied appearance of the recently introduced 4S,
the 997-series Turbo declares itself with a unique front bumper carrying
high-intensity LED indicators and parking lights integrated into a
horizontal bar running across the outer air ducts. The fog lamps are set
low on the corners within special housings designed to protect them from
stone damage.

Along the flanks, sills under the doors are more pronounced and sizeable
air ducts ahead of the rear wheel arches provide efficient cooling.
Changes to the rear include the adoption of a reshaped biplane wing
assembly that Porsche says will provide added levels of downforce, and
a bumper with small ducts to pull hot air out of the engine bay.
Completing the makeover, lightweight 19-inch alloy wheels wear ultra-
low-profile tires, accentuating a significantly lower ride height than
standard 911 models.

We've heard reports of power outputs of up to 500 hp—a massive 80-hp
or 19 percent increase above the outgoing model's 420 hp. The
company's habit of incremental improvement suggests the figure could
be significantly lower, though with others advertising 500 hp, Porsche
must be tempted to respond. Nothing is official just yet, but we're told to
expect a subtle 30-hp gain, taking the new model up to 450 hp (the
same power obtainable by adding a Porsche X50 power kit to today's
911 Turbo S—perhaps a similar option will be offer­ed on the new model).

What's one way to distinguish the 996 Turbo (above) from the new 997
Turbo pulling away from you on the highway? Note the new trapezoidal
exhaust openings and tips poking through the lower fascia, rather than
tucked under the rear trim.

The Turbo's torque figure also rises by about 30 lb-ft to 457 lb-ft. Drive
goes to all four wheels via a standard six-speed manual unit or a new
double-clutch automatic gearbox, and Porsche's familiar full-time awd
system.

Key to the increased output is Variable Turbine Geometry technology for
the two turbo­chargers. Common on high-performance diesel engines,
VTG continuously adjusts the angle of the turbocharger's vanes to
provide a more linear delivery of power and wider spread of torque. To
make this work on gasoline engines, with much higher exhaust
temperatures than diesel units, the BorgWarner-developed turbos
employ heat-resistant ceramics. The engine also benefits from improved
variable intake and exhaust valve timing.

As already reported by AutoWeek (“Porsche Juices the 911,” Nov. 7),
the 997 Turbo's weight is up to about 3520 pounds. Even with the added
weight, the 997 Turbo gains in power-to-weight ratio and should be able
to hit 60 mph in well under 4.0 seconds with a top speed of 190 mph.